Electric buzzer.



Patnted July 5, 1910.4

Ina-5111c]? J. F. MOEL'ROY. ELECTRIC BUZZER.

APPLIOATION FILED SEPT. 16, 1909.

i a citizen of the United JAMES F. MoELROY, or ALBANY, NEW

' HEATING COMPANY, A com YORK, ASSIGNOR 'IO CONSOLIDATED CAR- ORATION OFWEST VIRGINIA.

ELECTRIC BUZZER.

Specification of Letters Patent. Application filed September 16, 1909.Serial No.

'l'o all whom it may. concern: j Be it known that I, JAMES F. MoELRoY,States, residing at lbany, county of Albany, State of New York, haveinvented certain new and useful Inents in Electric Buzzers, the folsureof t e one form of my invention which I at pre ent deem preferable.

For a detailed description of the resent form of my invention, referencemay e had to the following specification and to the acv I companyingdrawings forming a part there of in which-' igure 1 is a plan and Fig. 2is an axial section of my device.

My invention relates to an electric buzzer and particularly includesmeans for increasing the intensity of the sound by securing thediaphragm at one pointand permitting its edges to vibrate in. acircular. recess against the sides of which the diaphragm may strike". Ialso provide a perforated cover above the diaphragm.

Referring to the drawing, A represents a casing of. a generalcylindrical form with an intermediate partition B about half way of thelength of the casing and screwed into an internal screw-threaded bearingin which it fixed by a set-screw 'C. On the said partition Bis seated amagnet, the core of the magnet being magnetically connected with themetal of the casing which forms a continuation of the magnetic circuit.The casing A is provided with a cover plate D which is's'ecured to thecasing by a screwE in such a way as to leave between the inside of thecover and the outside of the end of the casing a circular recess orchannel F.

.fitting into one pointof the circumference of the said channel orrecess E, where it is secured by a screw K. The diaphragm has a diameterslightly less than the internal -a magnet mounted therein,

Patented July 5 1910.

diameter of the aforesaid recess or channel I vibrations Wlll cause itto strike the sides of the channel or recess F, whereby the sound isintensified. In connection" with this the sound is-further increased'byproviding the perforations in the cover plate D. I

What I claim asneW' anddesire to secure by Letters Patent is:- i

1. An electric buzzer comprising a magnet, a circular diaphragm arrangedto be vibrated by said magnet, a supporting clip engaging said diaphragmat one point in its circumference, and an external part over hanging theedge'of said diaphragm and within range of the vibrations of thecircumferen'ce thereof.

2.- An electric buzzer comprising a casing, a circular diaphragmarranged to be vibrated by said magnet, a supporting clip engaging saiddia hragm at onepoint in its circumference, sai caslng bein providedwith a circular recess or channe 'inclosing the edge of the diaphragmand within range of tlie vibrations of the circumference thereof.

3. An electric buzzer comprising a casing, a magnet mounted therein, acircular diaphragm arranged to be vibrated by said magnet, a supportingclip 1 engaging said diaphragm at one point in 1ts circumference, saidcasing being provided with a circular recess or channel mc'losing the ede of the diaphragm and within range of the vibration of thecircumference thereof, said casing being also provided with perforationsopposite said diaphragm.

4:. An electric buzzer comprising a .oiagnet, a circular diaphragm.arranged to be vibrated by said magnet, a supporting cl p engaging saiddiaphragm at one point in its circumference, and an external part over-.hanging the edge of said diaphragm and within range of the vibrationsof the circumference thereof, and means for effectin a relativeadjustment of said magnet and Said diaphragm.

5.: An electric buzzer comprising a casing, a magnet, a support for saidmagnet adJustably mounted in said casing, a circular diawhen thediaphragm is in posiphragm arranged t magnet and said diaphragm at onepoint in its circumference, said casing being provided with an annularshoulder overhanging the edge of and Within the ram? of visaid diaphragmbration of the circumference thereo suppor o be vibrated by said- Inwitness ting means engaging my hand bef this 13th day Witnesses BEULAH J91m M. ESTERLY.

whereof I have hereunto set ore two subscribing Witnesses, of Segtember,1909.

J MES F. MGELROY.

CABLE,

